A tiny neural network (๐ฆ) generates images in your web browser.
๐ฆ was trained to denoise noisy input images (specifically - a small number of plant illustrations), given some guidance about what each final image looks like.
By starting from pure noise, and iteratively mixing in ๐ฆ's denoised predictions to chip away everything that looks like noise, ๐ฆ can generate new images based on new guidance.